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MusicPCB offers PCB projects to build guitar and bass effects, and synth modules. All PCBs are professionally manufactured, and include soldermask, a silkscreened component legend, and plated through holes and pads. They are designed to be easy to build, provide simple and clean wiring, to work well with your other pedals, modules, and instruments, and most of all to sound great and provide sounds and features not available in commercial designs.

Each PCB has an associated PDF document with wiring diagram, schematic, and build notes - several projects have large modification sections with details on how to perform a variety of mods to tailor the design to your needs/taste. You can read the full documentation for all of the PCBs before making a purchase.